laravelDynamicEmailConfigurationChange.php

<?php
//Email configuration is set in static method,that's why when same request multiple time email configuration changed,it was not work.
//for more details http://laravel.io/forum/07-22-2014-swiftmailer-with-dynamic-mail-configuration

$app = \App::getInstance();

            $app['swift.transport'] = $app->share(function ($app) {
                return new TransportManager($app);
            });

            $mailer = new \Swift_Mailer($app['swift.transport']->driver());
            \Mail::setSwiftMailer($mailer);